How to shorten the size of program

[wavic]

Import just what you need for the program.
For example:

In [1]: import urllib

In [2]: page = urllib.request.urlopen('http://python-forum.io')

In [3]: html = page.read()

Here I import the whole urllib module. But I am using only urlopen method. I do not need all the rest.
So it becomes:

In [1]: from urllib.request import urlopen

In [2]: page = urlopen('http://python-forum.io')

In [3]: html = page.read()